Steam-boiler furnace.



F. C. STIMMBL. STEAM BOILER FURNACE. APPLICATION FILED MAR.18,1909. I

2 SHEETS-SHEET 1.

Patented Mar. 10, 1914.

I uvcnoz (g M F. C. STIMMEL. STEAM BOILER FURNACE, APPLICATION FILED MAR 18, 1909.

Patented Mar. 10, 19%

2 SHEETS-SHEET 2.

' and to also provide UNITED STATES PATENT OFFICE.

FREDERICK C. STIMMEL, OF CHATTANOOG A, TENNESSEE, ASSIGNOR TO THE CASEY- HEDGES COMPANY, OF CHATTANOOGA, TENNESSEE, A CORPORATION OF OHIO.

STEAM-BOILER FURNACE.

. Specification of Letters Patent. Patented Mar. 10, 1914.

Application filed March 18, 1909. Serial No. 484,340.

To all ham it may concern Be t known that I, FREDERICK C. STIM- MEL, a citizen of the United States, residingat Chattanooga, in the county of Hamilton and State of Tennessee, have invented certain new and useful Improvements in Steam-Boiler Furnaces, of which the following is a specification.

This invention relates to improvements in steam boiler furnaces and it relates more particularly to that type of steam boiler which employs a steel casing or jacket as set forth in the patent to James F.- Casey, No. 766,873, dated August 9, 1904:.

An object of theinvention is to provide means for affording easy access to the lower part of the boiler for repairs or otherwise,

for facilitating the erection of the boiler setting and casing.

A further object of the invention is to provide means, in a type of boiler referred to, for arresting sparks and nnconsumed fuel before entering the flues.

A further object is to provide an improved method of cleaning the flues of the boiler.

The invention consists in the constructions and combinations of parts hereinafter described and set forth in the claims.

In the accompanying drawings, Figure 1 is a side elevation of a structure embodying the improvements. Fig. 2 is a longitudinal sectional view of the same. Fig. 3 is an enlarged vertical sectional view in perspective on the line on a: of Fig. 1. Fig. 4 is a detail hereinafter referred to.

Like parts are represented by similar characters of reference in the several views.

In the said drawing, 0. represents a boiler of the tubular type.

a is the furnace, shown in the present instance as of the Dutch oven type. As in the former patent referred to, there is employed in this structure vertical columns, I), supporting the transverse beams, b, to which the boiler supporting hanger rods are connected in the usual way. In the present device, the outer steel casing is constructed in two sections, an upper section, 0, one on each side of the boiler, and a lower section 0 In assembling the setting, the upper section is first secured to the upright supports, 1), by bolting or otherwise, which braces the structure formed by verse beams in a the uprights and the trans longitudinal direction and provides a stifi' rigid structure to build about. This upper section maybe one continuous late, as shown in Fig. 1, or may be formed y together by angle-irons.

The lower section is preferably made up of a series of half-round plates secured together by angle-irons and is supported entirely from the upper section in the manner shown in detail in Fig. 3. The upper section is removed from the sides of the boiler and the lower section is arranged eccentrically thereto so as to provide a passageway for the products of combustion. To the inner lower edge of each of the upper sections, 0, is secured an angle-iron, 0 and to each of the upper outer edges of'the lower section is also secured an angle-iron, 0 the corresponding angle-irons of the respective sections being arranged back-to-back and bolted together as shown. That part, a", of the lower sections which forms the converging throat between the oven or furnace and the lower sect-ion proper is connected to the upper section in a similar manner, except that it has its angle-iron, c, on its inner side, as shown in detail in Fig. 4, so that it may be extended up to bring its edge adjacent toand flush with the edges of the section, 0. This outer steelcasing, formed of the sections, a, c 0", supports the inner casing proper of fire-brick or other material, d. The upper part of this fire-brick casing is supported on the angle-iron, 0 so that whenever the lower part of the steel casing is removed for the purpose of repairs or otherwise, it will not be necessary to disturb the upper part of the fire-brick casing; it being simply necessary, when the lower section is again replaced, to reunite the break made in the fire-brick casing at the joint between the respective sections of the steel casing.

As illustrated at e in Figs. 1 and 2, the casing is dropped down at the extreme rear end to provide for a spark and ash arrester. Sparks and ashes striking the rear wall of the casing will drop down into this chamber and may be removed through the door, 6 shown in Fig. 2. This is due to the fact that the chamber, 6, begins at substantially the point where the boiler ends so that tho directionof the circulation of the productions of combustion will be upward above the chamber, e, which will allow the heavier two or more plates firmly secured unconsumed portions to drop back into the chamber afterstriking the rear wall.

It has been the common practice in boilers of this type to clean the tubes by injecting a blast of steam from the front, thus blowing the soot against the circulation of the products of combustion. In Fig. 2 is illustrated means for injecting a blast from the rear so that the tubes may be blown out in a direction with the circulation of the products of combustion so that the soot will be carried out therewith through the main flue. The rear wall, f, of the casing is provided with a series of openings, f each provided with a door, f through which doors the nozzle of the cleaner is inserted' There is preferably provided one door for every four tubes. This construction also permits of the cleaning of the boiler while in operation.

Having thus described my invention, I claim:

1. In a device of the'character described, a boiler, an outer steel casing for the same, said casing being formed of upper and lower sections, an inner lining of refractory material for said casing, a flange secured to said uppersection and extending beneath part of said lining to form a support for same, and means for removably securing said lower section to said flange to support said lower section from said upper section, substantially as specified.

2. In a device of the character described, a boiler, an outer steel casing for same formed of upper and lower sections, an inner laterally projecting flange onthe lower edge of said upper section, an inner lining of refractory material supported by said flange, an outer laterally projecting flange on the upper edge of said lower section, and means for removably securing said flanges together tion from said upper section, as specified.

to support said lower secsubstantially 3. In adevice of the character described, a boiler, an outer steel casing for said boiler, said casing being formed of an upper section on each side of said boiler and a lower section, an inner laterally projecting flange on the lower edge of each of said upper sections, an inner lining .of refractory material for said upper sections supported by said flanges, and an outwardly projecting flange on each of the upper edges of said lower section removably secured to the flanges of the upper sections to support said lower section from said upper sections, substantially as specified.

4. In a device of the character described, a boiler, an outer steel casing for same, said casing being formed of upper and lower sections, supports for said upper section, an inner lining of refractory material for said upper section, a shelf secured to said; upper section for sup-porting said lining, and means for removably securing said, lower section to said shelf to support said lower section from said upper section, substantially as specified.

5. In a device of the character described, a boiler, an outer st'eel casing for same, said casing being formed of upper and lower sections, supports for said upper section, an inner lining of refractory material for said upper section, a shelf secured to said upper section for supporting said lining, devices for removably securing said lower section to the shelf to support said lower section from said upper section, and a lining of refractory material for said lower section and supported thereby, substantially as specifled.

In testimony whereof, have hereunto set my hand this 13th day of 'March 1909.

FREDERICK C. STIMMEL.

Witnesses:

W. E. LEGG, JNo, A. STEWART. 

